IB Flashcard: B1.2 (Molecules)

Front

What distinguishes an amino acid from carbohydrates and lipids?

Back

The presence of nitrogen.

Front

What are the monomers that make up proteins?

Back

Amino acids.

Front

How many different amino acids are there?

Back

20.

Front

Which proteins bind to antigens on bacteria and other pathogens?

Back

Immunoglobulins.

Front

Which of the following is not a function of proteins: Blood clotting, Muscle contraction, Insulation, Packing DNA?

Back

Insulation.

Front

What is the basic structure of an amino acid?

Back

An amino group, a carboxyl group, a hydrogen atom, and a variable R group.

Front

What role do enzymes play in biological systems?

Back

They act as catalysts to speed up chemical reactions.

Front

What is the primary structure of a protein?

Back

The sequence of amino acids in a polypeptide chain.

Front

What is the function of hemoglobin?

Back

To transport oxygen in the blood.

Front

What is a peptide bond?

Back

A covalent bond formed between two amino acids during protein synthesis.